The interactome of fibrillar aggregates of the Tau repeat domain fused to YFP (TauRD-Y) was analyzed in HEK293T cells using SILAC. TauRD-Y was immunoprecipitated with anti-GFP antibody from lysates of SILAC-labeled cells expressing TauRD-Y in soluble form (light labeled; L), from cells containing aggregated TauRD-Y in nucleus and cytosol (medium labeled; M), and from cells containing aggregated TauRD-Y mainly localized to the cytoosl (heavy-labeled; H).